The Experts below are selected from a list of 69 Experts worldwide ranked by ideXlab platform
Mikael Skrifvars - One of the best experts on this subject based on the ideXlab platform.
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characterization of thermoplastic natural Fibre composites made from woven hybrid yarn prepregs with different weave pattern
Composites Part A-applied Science and Manufacturing, 2015Co-Authors: Behnaz Baghaei, Mikael Skrifvars, Lena BerglinAbstract:The interest in natural Fibres as reinforcement for composite materials has been steadily increasing due to their attractive mechanical properties and the possibility of making more eco-friendly materials. Currently, various alternatives are being introduced for commercial applications, as Fibres such as hemp, jute and flax exhibit properties, which make them appropriate for structural composite components. Biocomposites offer reductions in weight and cost and have less reliance on foreign oil resources, making them attractive. Several investigations have revealed that the full utilisation of Fibre mechanical properties in the final composites can be exploited, provided an aligned Fibre orientation is chosen. In fact, a major challenge for natural Fibre reinforced composites is to achieve high mechanical performance at competitive prices. The use of commingled/hybrid yarns is one of the more promising methods for manufacturing structural thermoplastic composites.Commingled yarns of thermoplastic and reinforcing Fibres offer a potential for cost-effective production of composite parts, thanks to reduced applied pressures and impregnation times during processing. Besides economic advantages, there is also direct control over Fibre placements and ease of handling of Fibres in yarn process. The yarn technologies provide homogenous distribution of reinforcing Fibre and matrix. Variation in natural Fibre properties has been a major problem facing composite manufacturers, compared to carbon and glass Fibres that have well-defined production processes. This issue can be addressed by Regenerated Cellulose Fibres. These Fibres can be reproduced easily with high surface evenness and even quality, making it possible to get consistent results, which is not possible with natural Fibres. Combination of natural and Regenerated Cellulose Fibre brings together the best of both materials. The end result is a product with superior properties, which could not be obtained by the individual components.This thesis describes the development of aligned hybrid yarns with low Fibre twist, for high performance natural (hemp) and man-made (Lyocell) Cellulose Fibre-reinforced biocomposites, suitable for use in structural or semi-structural applications. The properties of composites in terms of Fibre orientation, off-axis angle and alkali treatment were investigated, focusing on determining void%, water absorption, mechanical and thermo-mechanical properties. The results show that combining hemp and Lyocell in PLA composite leads to the reduction of moisture absorption and can improve the mechanical properties. The mechanical properties of the composites were highly affected by the Fibre direction. The alkali treatment on hemp Fibre improved the mechanical properties of the composites.
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Effect of alkali and silane surface treatments on Regenerated Cellulose Fibre type (Lyocell) intended for composites
Cellulose, 2015Co-Authors: Sunil Kumar Ramamoorthy, Mikael Skrifvars, Marja RissanenAbstract:Cellulose Fibres have significant importance and potential for polymer reinforcement. It is essential to modify the surface of the Fibre to obtain good Fibre-matrix interface. Surface treatments can increase surface roughness of the Fibre, change its chemical composition and introduce new moieties that can effectively interlock with the matrix, resulting in good mechanical properties in the composites. This is mainly due to improved Fibre-matrix adhesion. The treatments may also reduce the water absorption rate by converting part of the hydroxyl groups on the Fibre surface into other functional groups. Chemical modification of the surface of a Regenerated Cellulose Fibre of the Lyocell type was carried out by alkali and silane treatments, which significantly changed the properties of the Lyocell Fibres. Three parameters were considered when the Fibre surface treatment was done: concentration (2–15 wt%), temperature (25 and 50 °C) and time (30 min–72 h). Fourier transform infrared spectroscopy and Raman spectroscopy were used for chemical analysis and qualitative analysis of the Cellulose crystallinity due to the surface treatments; subsequently, mechanical strength of the Fibres was tested by tensile testing. Weight loss, moisture regain and swelling measurements were taken before and after treatments, which showed the obvious changes in Fibre properties on treatment. Heat capacity of the Fibres was measured for untreated and treated Fibres, and thermal degradation of Fibres was examined to see the stability of Fibres at elevated temperatures. Wettability and surface energies were measured using dynamic contact angle method in three wetting mediums. Scanning electron microscopy was used to study the morphological properties of the Fibres.
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Regenerated Cellulose Fibre reinforced casein films: Effect of plasticizer and Fibres on the film properties
Macromolecular Research, 2014Co-Authors: Sung-woo Cho, Mikael Skrifvars, Kumar Hemanathan, Pirabasenan Mahimaisenan, Kayode AdekunleAbstract:The idea of using man-made cellulosic Fibres as reinforcement for casein films in this study was inspired by their well defined Fibre diameter and availability in large quantity, eventually leading to a homogeneous high quality composite at low cost. The casein biofilms were fabricated by solution casting from an aqueous alkaline solution of the bovine milk protein casein in the presence of glycerol as a plasticizer, and the Fibre-reinforced biocomposites were prepared by the addition of Regenerated Cellulose Fibre to the casein casting solution with various amounts of glycerol. The effects of glycerol content and Cellulose Fibre reinforcements on the mechanical, thermal and physiological properties were characterized. The results showed that increasing glycerol content decreased the film strength, Young’s modulus and thermal stability with a gradual increase in the elongation. However, the tensile properties were noticeably improved when reinforced with Cellulose Fibre. The composite with 20 wt% glycerol and 20 wt% Cellulose Fibre showed the maximum tensile strength of 23.5 MPa and Young’s modulus of 1.5 GPa. The corresponding values for the composite with 30 wt% glycerol and the same Fibre content were 15.1 MPa and 0.9 GPa, which were 2.3- and 3.2-fold higher compared to 30 wt% glycerol plasticized film. The thermal analysis revealed that the glass transition temperature and the thermal stability were decreased when the glycerol content was increased. Addition of Cellulose Fibres increased the glass transition temperature as well as the thermal stability. The gel electrophoresis (SDS-PAGE) analysis indicated that there was no significant decrease in the molecular weight of the casein protein during sample preparation. Scanning electron microscopy showed that the obtained composites with low glycerol content had adequate interfacial bonding, and Fourier transform IR spectroscopy confirmed the formation of molecular interactions between the Cellulose Fibres and the casein. Open image in new window
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Regenerated Cellulose Fibre reinforced case in films : Effect of plasticizer and Fibre content
2013Co-Authors: Mikael Skrifvars, Sung-woo Cho, Kumar Hemanathan, Pirabasenan Mahimaisenen, Kayode AdekunleAbstract:Regenerated Cellulose Fibre reinforced case in films : Effect of plasticizer and Fibre content
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manufacture and characterisation of thermoplastic composites made from pla hemp co wrapped hybrid yarn prepregs
Composites Part A-applied Science and Manufacturing, 2013Co-Authors: Behnaz Baghaei, Mikael Skrifvars, Lena BerglinAbstract:The interest in natural Fibres as reinforcement for composite materials has been steadily increasing due to their attractive mechanical properties and the possibility of making more eco-friendly materials. Currently, various alternatives are being introduced for commercial applications, as Fibres such as hemp, jute and flax exhibit properties, which make them appropriate for structural composite components. Biocomposites offer reductions in weight and cost and have less reliance on foreign oil resources, making them attractive. Several investigations have revealed that the full utilisation of Fibre mechanical properties in the final composites can be exploited, provided an aligned Fibre orientation is chosen. In fact, a major challenge for natural Fibre reinforced composites is to achieve high mechanical performance at competitive prices. The use of commingled/hybrid yarns is one of the more promising methods for manufacturing structural thermoplastic composites.Commingled yarns of thermoplastic and reinforcing Fibres offer a potential for cost-effective production of composite parts, thanks to reduced applied pressures and impregnation times during processing. Besides economic advantages, there is also direct control over Fibre placements and ease of handling of Fibres in yarn process. The yarn technologies provide homogenous distribution of reinforcing Fibre and matrix. Variation in natural Fibre properties has been a major problem facing composite manufacturers, compared to carbon and glass Fibres that have well-defined production processes. This issue can be addressed by Regenerated Cellulose Fibres. These Fibres can be reproduced easily with high surface evenness and even quality, making it possible to get consistent results, which is not possible with natural Fibres. Combination of natural and Regenerated Cellulose Fibre brings together the best of both materials. The end result is a product with superior properties, which could not be obtained by the individual components.This thesis describes the development of aligned hybrid yarns with low Fibre twist, for high performance natural (hemp) and man-made (Lyocell) Cellulose Fibre-reinforced biocomposites, suitable for use in structural or semi-structural applications. The properties of composites in terms of Fibre orientation, off-axis angle and alkali treatment were investigated, focusing on determining void%, water absorption, mechanical and thermo-mechanical properties. The results show that combining hemp and Lyocell in PLA composite leads to the reduction of moisture absorption and can improve the mechanical properties. The mechanical properties of the composites were highly affected by the Fibre direction. The alkali treatment on hemp Fibre improved the mechanical properties of the composites.
Lena Berglin - One of the best experts on this subject based on the ideXlab platform.
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characterization of thermoplastic natural Fibre composites made from woven hybrid yarn prepregs with different weave pattern
Composites Part A-applied Science and Manufacturing, 2015Co-Authors: Behnaz Baghaei, Mikael Skrifvars, Lena BerglinAbstract:The interest in natural Fibres as reinforcement for composite materials has been steadily increasing due to their attractive mechanical properties and the possibility of making more eco-friendly materials. Currently, various alternatives are being introduced for commercial applications, as Fibres such as hemp, jute and flax exhibit properties, which make them appropriate for structural composite components. Biocomposites offer reductions in weight and cost and have less reliance on foreign oil resources, making them attractive. Several investigations have revealed that the full utilisation of Fibre mechanical properties in the final composites can be exploited, provided an aligned Fibre orientation is chosen. In fact, a major challenge for natural Fibre reinforced composites is to achieve high mechanical performance at competitive prices. The use of commingled/hybrid yarns is one of the more promising methods for manufacturing structural thermoplastic composites.Commingled yarns of thermoplastic and reinforcing Fibres offer a potential for cost-effective production of composite parts, thanks to reduced applied pressures and impregnation times during processing. Besides economic advantages, there is also direct control over Fibre placements and ease of handling of Fibres in yarn process. The yarn technologies provide homogenous distribution of reinforcing Fibre and matrix. Variation in natural Fibre properties has been a major problem facing composite manufacturers, compared to carbon and glass Fibres that have well-defined production processes. This issue can be addressed by Regenerated Cellulose Fibres. These Fibres can be reproduced easily with high surface evenness and even quality, making it possible to get consistent results, which is not possible with natural Fibres. Combination of natural and Regenerated Cellulose Fibre brings together the best of both materials. The end result is a product with superior properties, which could not be obtained by the individual components.This thesis describes the development of aligned hybrid yarns with low Fibre twist, for high performance natural (hemp) and man-made (Lyocell) Cellulose Fibre-reinforced biocomposites, suitable for use in structural or semi-structural applications. The properties of composites in terms of Fibre orientation, off-axis angle and alkali treatment were investigated, focusing on determining void%, water absorption, mechanical and thermo-mechanical properties. The results show that combining hemp and Lyocell in PLA composite leads to the reduction of moisture absorption and can improve the mechanical properties. The mechanical properties of the composites were highly affected by the Fibre direction. The alkali treatment on hemp Fibre improved the mechanical properties of the composites.
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manufacture and characterisation of thermoplastic composites made from pla hemp co wrapped hybrid yarn prepregs
Composites Part A-applied Science and Manufacturing, 2013Co-Authors: Behnaz Baghaei, Mikael Skrifvars, Lena BerglinAbstract:The interest in natural Fibres as reinforcement for composite materials has been steadily increasing due to their attractive mechanical properties and the possibility of making more eco-friendly materials. Currently, various alternatives are being introduced for commercial applications, as Fibres such as hemp, jute and flax exhibit properties, which make them appropriate for structural composite components. Biocomposites offer reductions in weight and cost and have less reliance on foreign oil resources, making them attractive. Several investigations have revealed that the full utilisation of Fibre mechanical properties in the final composites can be exploited, provided an aligned Fibre orientation is chosen. In fact, a major challenge for natural Fibre reinforced composites is to achieve high mechanical performance at competitive prices. The use of commingled/hybrid yarns is one of the more promising methods for manufacturing structural thermoplastic composites.Commingled yarns of thermoplastic and reinforcing Fibres offer a potential for cost-effective production of composite parts, thanks to reduced applied pressures and impregnation times during processing. Besides economic advantages, there is also direct control over Fibre placements and ease of handling of Fibres in yarn process. The yarn technologies provide homogenous distribution of reinforcing Fibre and matrix. Variation in natural Fibre properties has been a major problem facing composite manufacturers, compared to carbon and glass Fibres that have well-defined production processes. This issue can be addressed by Regenerated Cellulose Fibres. These Fibres can be reproduced easily with high surface evenness and even quality, making it possible to get consistent results, which is not possible with natural Fibres. Combination of natural and Regenerated Cellulose Fibre brings together the best of both materials. The end result is a product with superior properties, which could not be obtained by the individual components.This thesis describes the development of aligned hybrid yarns with low Fibre twist, for high performance natural (hemp) and man-made (Lyocell) Cellulose Fibre-reinforced biocomposites, suitable for use in structural or semi-structural applications. The properties of composites in terms of Fibre orientation, off-axis angle and alkali treatment were investigated, focusing on determining void%, water absorption, mechanical and thermo-mechanical properties. The results show that combining hemp and Lyocell in PLA composite leads to the reduction of moisture absorption and can improve the mechanical properties. The mechanical properties of the composites were highly affected by the Fibre direction. The alkali treatment on hemp Fibre improved the mechanical properties of the composites.
Behnaz Baghaei - One of the best experts on this subject based on the ideXlab platform.
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characterization of thermoplastic natural Fibre composites made from woven hybrid yarn prepregs with different weave pattern
Composites Part A-applied Science and Manufacturing, 2015Co-Authors: Behnaz Baghaei, Mikael Skrifvars, Lena BerglinAbstract:The interest in natural Fibres as reinforcement for composite materials has been steadily increasing due to their attractive mechanical properties and the possibility of making more eco-friendly materials. Currently, various alternatives are being introduced for commercial applications, as Fibres such as hemp, jute and flax exhibit properties, which make them appropriate for structural composite components. Biocomposites offer reductions in weight and cost and have less reliance on foreign oil resources, making them attractive. Several investigations have revealed that the full utilisation of Fibre mechanical properties in the final composites can be exploited, provided an aligned Fibre orientation is chosen. In fact, a major challenge for natural Fibre reinforced composites is to achieve high mechanical performance at competitive prices. The use of commingled/hybrid yarns is one of the more promising methods for manufacturing structural thermoplastic composites.Commingled yarns of thermoplastic and reinforcing Fibres offer a potential for cost-effective production of composite parts, thanks to reduced applied pressures and impregnation times during processing. Besides economic advantages, there is also direct control over Fibre placements and ease of handling of Fibres in yarn process. The yarn technologies provide homogenous distribution of reinforcing Fibre and matrix. Variation in natural Fibre properties has been a major problem facing composite manufacturers, compared to carbon and glass Fibres that have well-defined production processes. This issue can be addressed by Regenerated Cellulose Fibres. These Fibres can be reproduced easily with high surface evenness and even quality, making it possible to get consistent results, which is not possible with natural Fibres. Combination of natural and Regenerated Cellulose Fibre brings together the best of both materials. The end result is a product with superior properties, which could not be obtained by the individual components.This thesis describes the development of aligned hybrid yarns with low Fibre twist, for high performance natural (hemp) and man-made (Lyocell) Cellulose Fibre-reinforced biocomposites, suitable for use in structural or semi-structural applications. The properties of composites in terms of Fibre orientation, off-axis angle and alkali treatment were investigated, focusing on determining void%, water absorption, mechanical and thermo-mechanical properties. The results show that combining hemp and Lyocell in PLA composite leads to the reduction of moisture absorption and can improve the mechanical properties. The mechanical properties of the composites were highly affected by the Fibre direction. The alkali treatment on hemp Fibre improved the mechanical properties of the composites.
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manufacture and characterisation of thermoplastic composites made from pla hemp co wrapped hybrid yarn prepregs
Composites Part A-applied Science and Manufacturing, 2013Co-Authors: Behnaz Baghaei, Mikael Skrifvars, Lena BerglinAbstract:The interest in natural Fibres as reinforcement for composite materials has been steadily increasing due to their attractive mechanical properties and the possibility of making more eco-friendly materials. Currently, various alternatives are being introduced for commercial applications, as Fibres such as hemp, jute and flax exhibit properties, which make them appropriate for structural composite components. Biocomposites offer reductions in weight and cost and have less reliance on foreign oil resources, making them attractive. Several investigations have revealed that the full utilisation of Fibre mechanical properties in the final composites can be exploited, provided an aligned Fibre orientation is chosen. In fact, a major challenge for natural Fibre reinforced composites is to achieve high mechanical performance at competitive prices. The use of commingled/hybrid yarns is one of the more promising methods for manufacturing structural thermoplastic composites.Commingled yarns of thermoplastic and reinforcing Fibres offer a potential for cost-effective production of composite parts, thanks to reduced applied pressures and impregnation times during processing. Besides economic advantages, there is also direct control over Fibre placements and ease of handling of Fibres in yarn process. The yarn technologies provide homogenous distribution of reinforcing Fibre and matrix. Variation in natural Fibre properties has been a major problem facing composite manufacturers, compared to carbon and glass Fibres that have well-defined production processes. This issue can be addressed by Regenerated Cellulose Fibres. These Fibres can be reproduced easily with high surface evenness and even quality, making it possible to get consistent results, which is not possible with natural Fibres. Combination of natural and Regenerated Cellulose Fibre brings together the best of both materials. The end result is a product with superior properties, which could not be obtained by the individual components.This thesis describes the development of aligned hybrid yarns with low Fibre twist, for high performance natural (hemp) and man-made (Lyocell) Cellulose Fibre-reinforced biocomposites, suitable for use in structural or semi-structural applications. The properties of composites in terms of Fibre orientation, off-axis angle and alkali treatment were investigated, focusing on determining void%, water absorption, mechanical and thermo-mechanical properties. The results show that combining hemp and Lyocell in PLA composite leads to the reduction of moisture absorption and can improve the mechanical properties. The mechanical properties of the composites were highly affected by the Fibre direction. The alkali treatment on hemp Fibre improved the mechanical properties of the composites.
Jörg Müssig - One of the best experts on this subject based on the ideXlab platform.
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Composite models for compression moulded long Regenerated Cellulose Fibre-reinforced brittle polylactide (PLA)
Composites Science and Technology, 2017Co-Authors: Nina Graupner, Gerhard Ziegmann, Jörg MüssigAbstract:Abstract The present study shows a new approach for the prediction of tensile strength values of compression moulded long Cellulose Fibre-reinforced brittle polylactide (PLA) composites. For this approach Regenerated Cellulose Fibres (lyocell) of variable fineness were used as reinforcement. Composites with different Fibre loadings (17, 26 and 36 vol-%) and mean Fibre orientation angles ranging between ± 20 and ± 65° were manufactured. Some published models were applied to the mechanical properties of our composites. While the rule of mixture as well as the Kelly-Tyson model lead to a clear overestimation of the strength values, the model of Taha & El-Sabbagh et al. (developed for injection moulded composites) leads to a clear underestimation. On the basis of the Kelly-Tyson-model expanded with Taha & El-Sabbagh et al.'s agglomeration factor and the use of the Fibre stress at the point of elongation at break of the composite a new model was created for compression moulded Regenerated Cellulose Fibre-reinforced composites. Overall, 19 different composites were investigated. 13 of them show a deviation from the model data to the measured tensile strength of
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surface properties and Fibre matrix adhesion of man made Cellulose epoxy composites influence on impact properties
Composites Science and Technology, 2016Co-Authors: A Mader, A Kondor, T Schmid, Rudolf Einsiedel, Jörg MüssigAbstract:Abstract Previously conducted studies showed that UD Regenerated Cellulose Fibre-reinforced thermoset composites can obtain specific Charpy impact strength values in the range of glass Fibre reinforced composites. Composites of two different viscose Fibre types, each with and without an oily avivage, were investigated. Despite similar mechanical properties of the Fibres the impact strength of the CR Fibre composites was about twice as high as that of the standard Fibre composites. To reveal a possible explanation for this effect the Fibre surface properties were investigated more closely. AFM measurements showed no differences in Fibre surface topologies. However the physico–chemical properties of the Fibre types differ. IGC measurements showed that the standard Cordenka Fibre without avivage (“ std wo a. ”) possesses a slightly higher specific surface energy and base number (K b ) than the CR Fibres without avivage (“ CR wo a. ”) resulting in a better adhesion to the highly polar epoxy. This is also shown by the pair specific interaction parameters (I sp ) and the work of adhesion. Both are clearly higher for the epoxy – “std wo a.” pair. Accordingly the measured Fibre pull-out lengths of the CR Fibres are one order of magnitude higher than of the std suggesting a weaker interfacial shear strength between the CR Fibres and epoxy. Within the same Fibre type the samples without avivage show longer pull-out lengths. As a weaker Fibre-matrix adhesion causes stronger crack deflection and energy dissipation these results correspond well with the previously measured Charpy impact strengths.
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improvement and analysis of Fibre matrix adhesion of Regenerated Cellulose Fibre reinforced pp mapp and pla composites by the use of eucalyptus globulus lignin
Composites Part B-engineering, 2014Co-Authors: Nina Graupner, Gerhard Ziegmann, Holger Fischer, Jörg MüssigAbstract:The presented study investigates the influence of Eucalyptus globulus lignin as a natural additive on the Fibre/matrix interaction of lyocell (Regenerated Cellulose Fibre) in different matrices (polylactide – PLA, polypropylene – PP, maleic-anhydride-grafted-PP – MAPP). For this purpose, lyocell Fibres were treated with a lignin–ethanol solution. It was shown that the Fibre tensile strength was not affected by the lignin-treatment. The viscosity of the PLA matrix was reduced by adding lignin. This effect might lead to a better wettability of the Fibres but the mechanical characteristics of PLA were not affected by the treatment. Apparent Fibre/matrix adhesion was assessed using a single Fibre pull-out test and a single Fibre fragmentation test. Both testing procedures revealed a trend of improved interfacial shear strength for the lignin-treated Fibres compared with untreated Fibres for all investigated matrices. Additionally the apparent interfacial shear strength was investigated with short bending tests and double-notched tensile tests on lyocell/PLA composites. A significant increase was observed for lignin-treated composites compared to untreated composites. Microscopic investigations revealed a rougher Fibre surface with lignin particles. The higher specific Fibre surface can also lead to improved apparent Fibre/matrix interaction. Furthermore, it is hypothesised that van-der-Waals forces between the hydrophilic Fibres and the more hydrophobic matrix are favoured by the less hydrophobic character of lignin.
Nina Graupner - One of the best experts on this subject based on the ideXlab platform.
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Composite models for compression moulded long Regenerated Cellulose Fibre-reinforced brittle polylactide (PLA)
Composites Science and Technology, 2017Co-Authors: Nina Graupner, Gerhard Ziegmann, Jörg MüssigAbstract:Abstract The present study shows a new approach for the prediction of tensile strength values of compression moulded long Cellulose Fibre-reinforced brittle polylactide (PLA) composites. For this approach Regenerated Cellulose Fibres (lyocell) of variable fineness were used as reinforcement. Composites with different Fibre loadings (17, 26 and 36 vol-%) and mean Fibre orientation angles ranging between ± 20 and ± 65° were manufactured. Some published models were applied to the mechanical properties of our composites. While the rule of mixture as well as the Kelly-Tyson model lead to a clear overestimation of the strength values, the model of Taha & El-Sabbagh et al. (developed for injection moulded composites) leads to a clear underestimation. On the basis of the Kelly-Tyson-model expanded with Taha & El-Sabbagh et al.'s agglomeration factor and the use of the Fibre stress at the point of elongation at break of the composite a new model was created for compression moulded Regenerated Cellulose Fibre-reinforced composites. Overall, 19 different composites were investigated. 13 of them show a deviation from the model data to the measured tensile strength of
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improvement and analysis of Fibre matrix adhesion of Regenerated Cellulose Fibre reinforced pp mapp and pla composites by the use of eucalyptus globulus lignin
Composites Part B-engineering, 2014Co-Authors: Nina Graupner, Gerhard Ziegmann, Holger Fischer, Jörg MüssigAbstract:The presented study investigates the influence of Eucalyptus globulus lignin as a natural additive on the Fibre/matrix interaction of lyocell (Regenerated Cellulose Fibre) in different matrices (polylactide – PLA, polypropylene – PP, maleic-anhydride-grafted-PP – MAPP). For this purpose, lyocell Fibres were treated with a lignin–ethanol solution. It was shown that the Fibre tensile strength was not affected by the lignin-treatment. The viscosity of the PLA matrix was reduced by adding lignin. This effect might lead to a better wettability of the Fibres but the mechanical characteristics of PLA were not affected by the treatment. Apparent Fibre/matrix adhesion was assessed using a single Fibre pull-out test and a single Fibre fragmentation test. Both testing procedures revealed a trend of improved interfacial shear strength for the lignin-treated Fibres compared with untreated Fibres for all investigated matrices. Additionally the apparent interfacial shear strength was investigated with short bending tests and double-notched tensile tests on lyocell/PLA composites. A significant increase was observed for lignin-treated composites compared to untreated composites. Microscopic investigations revealed a rougher Fibre surface with lignin particles. The higher specific Fibre surface can also lead to improved apparent Fibre/matrix interaction. Furthermore, it is hypothesised that van-der-Waals forces between the hydrophilic Fibres and the more hydrophobic matrix are favoured by the less hydrophobic character of lignin.